Sometimes we need to scale tenant workloads to zero. 

We need "knobs" in the gitops-config and acscs-manifest/tenant-resources helm chart to scale the different deployments to zero (central, scanner, scanner-v4-matcher, scanner-v4-indexer, scanner-v4-db).

• Prefer an explicit knob for every workload.

• Prefer flat structure instead of nested values (prefer centralScaleToZero to central.scaleToZero)

centralScaleToZero: true/false

scannerScaleToZero: true/false

(feel free to find a better name for those knobs).

DOD

• acscs-manifests/tenant-resources helm chart is changed to function with those knobs (probably through overlays).
• SOP for scaling tenant workloads to zero is merged into the runbooks repository.